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• which kernels can I safely purge?

  - by ecoologic

  I use the main answer of this question quite often to clear some space, but now I'm in extreme need and I'd like to better understand which kernels are safe to purge, my list is the following 10:50:58-673 - ~> dpkg -l | grep -Eo "^.i +linux-(image|headers)[^ ]+" | cut -c 5- | grep --color -E "$|"`uname -r` linux-headers-2.6.38-15 linux-headers-2.6.38-15-generic linux-headers-2.6.38-15-generic-pae linux-headers-2.6.38-16 linux-headers-2.6.38-16-generic linux-headers-2.6.38-16-generic-pae # current one linux-headers-generic linux-headers-generic-pae linux-headers-server linux-image-2.6.38-15-generic-pae linux-image-2.6.38-16-generic-pae linux-image-generic-pae linux-image-server Is it enough to keep linux-headers-2.6.38-15 linux-headers-2.6.38-15-generic linux-headers-2.6.38-15-generic-pae linux-headers-2.6.38-16 linux-headers-2.6.38-16-generic linux-headers-2.6.38-16-generic-pae # current one Or would this be enough linux-headers-2.6.38-15-generic-pae linux-headers-2.6.38-16-generic-pae # current one Or which other would be the shortest (keeping the previous one too)? And why?

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• How to make grub stop appearing every time I boot?

  - by Justin Riddiough

  I'm using Ubuntu 12.04 and grub selections appear each time I boot. This happens on both of my computers. I have tried editing the /etc/defaults/grub to use default, to use the 0 entry, and ran the update on it. But nothing seems to solve the problem. (showing uncommented lines) $ sudo nano /etc/default/grub GRUB_DEFAULT=0 GRUB_HIDDEN_TIMEOUT=0 GRUB_HIDDEN_TIMEOUT_QUIET=true GRUB_TIMEOUT=10 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" GRUB_CMDLINE_LINUX="" $ sudo update-grub Generating grub.cfg ... Found linux image: /boot/vmlinuz-3.2.0-25-generic-pae Found initrd image: /boot/initrd.img-3.2.0-25-generic-pae Found linux image: /boot/vmlinuz-3.2.0-24-generic-pae Found initrd image: /boot/initrd.img-3.2.0-24-generic-pae Found memtest86+ image: /boot/memtest86+.bin No volume groups found done

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• How to create a map-like (clouds) texture [duplicate]

  - by user16547

  This question already has an answer here: How do you generate tileable Perlin noise? 9 answers If you place a map of the world on a sphere, it will look like the image is continuous. Basically the left end of the image is sort of a continuation of the right end. You won't be able to see any cuts. I'm trying to create a clouds texture to add to my planet such that it will seem it has clouds. I managed to create the clouds in GIMP, however, I can't figure out how to make sure the left end of my image is a smooth continuation of the right end. For example if you were to map the below image to your sphere (I removed transparency to make it clearer), there would be a very obvious transition from the right end of the image back to the left end on your sphere. How would I create a texture such that I get rid of that? Sorry for my lack of terminology.

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• .htaccess and browser caching

  - by Tim

  I ran across these suggested htaccess edits. Is this a good practice? Is this something I should implement on my wordpress site?: <IfModule mod_expires.c> ExpiresActive On ExpiresByType image/jpg "access plus 1 year" ExpiresByType image/jpeg "access plus 1 year" ExpiresByType image/gif "access plus 1 year" ExpiresByType image/png "access plus 1 year" ExpiresByType text/css "access plus 1 month" ExpiresByType application/pdf "access plus 1 month" ExpiresByType text/x-javascript "access plus 1 month" ExpiresByType application/x-shockwave-flash "access plus 1 month" ExpiresByType image/x-icon "access plus 1 year" ExpiresDefault "access plus 2 days" </IfModule>

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• Hover image - part of forms appears untill hover another How?

  - by Mac

  Im trying to make part of my form/questionnaire appears when hover on image and stay active untill hover another image next to it. and repeat it on 7 images. Of course I need the cheched checkboxes to stay after they'll be hidden so you can come back to them by hover the image and for ex. correct answers and so on.. I was using a j code: <script type="text/javascript"> $("#Oobj51").hover(function(){ $('#Oobj58').show(); },function(){ $('#Oobj58').hide(); }); </script> it works to another elements on my page but not to the form. how can i do it maybe with css class or another j code. Thanks! Parts of html: (let's say I want to hover on "Oobj56" and make "Oobj58" appears and stay as I said before...) <div id="Oobj56"> <button type="submit" class="przed6" onmouseover="this.className='po6'" onmouseout="this.className='przed6'" /> </div> <div id="Oobj57"> <button type="submit" class="przed7" onmouseover="this.className='po7'" onmouseout="this.className='przed7'" /> </div> <div id="Oobj60"> <form action="mailto:" method="post" enctype="text/plain"> <div id="Oobj59"> <input type="text" input size="8" name="imie" placeholder="imie"> <input type="text" input size="11" name="numer" placeholder="numer telefonu"> <br><br> <select name="miasto"> <option selected="Miasto">Miasto</option> <option>Wroclaw</option> <option>Warszawa</option> <option>Kraków</option> <option>Trójmiasto</option> <option>Poznan</option> <option>Szczecin</option> <option>Torun</option> <option>Lódz</option> <option>Bydgoszcz</option> <option>Lublin</option> <option>Katowice</option> </select> <select name="wiek"> <option selected="selected">Wiek</option> <option> <15 </option> <option>15-19</option> <option>20-24</option> <option>25-29</option> <option>30-34</option> <option>35-39</option> <option>40-44</option> <option>45-49</option> <option>50-54</option> <option>55-59</option> <option>60-64</option> <option>65-69</option> <option>70-74</option> <option> >75 </option> </select> <select name="plec"> <option selected="selected">Plec</option> <option>Mezczyzna</option> <option>Kobieta</option> </select></div> <div id="Oobj58"> <script language="JavaScript"> function toggle(source) { checkboxes = document.getElementsByName('sport'); for(var i=0, n=checkboxes.length;i<n;i++) { checkboxes[i].checked = source.checked; } } </script> <input type="checkbox" onClick="toggle(this)" /><br> <input type="checkbox" name="sport" value="gym" />silownia<br /> <input type="checkbox" name="sport" value="fitness" />fitness<br /> <input type="checkbox" name="sport" value="noga" />pilka nozna<br /> <input type="checkbox" name="sport" value="kosz" />koszykówka<br /> <input type="checkbox" name="sport" value="siata" />siatkówka<br /> <input type="checkbox" name="sport" value="ameryka" />football amerykanski<br /> <input type="checkbox" name="sport" value="konie" />jezdziectwo konne<br /> <input type="checkbox" name="sport" value="basen" />basen/sporty wodne<br /> <input type="checkbox" name="sport" value="zima" />sporty zimowe<br /> </div> <div id="Oobj15"> <input type="submit" style="font-family: Open Sans;" value="Wyslij" class="wyslij" /> </div></form> </div>

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• DRBD not syncing between my nodes when IP is reset

  - by ramdaz

  I am trying to setup DRBD by following the article at http://www.howtoforge.com/setting-up-network-raid1-with-drbd-on-ubuntu-11.10-p2 I am using Ubuntu 10.04 DRBD - 8.3.11 In the first run I had everything working perfectly and when shifting the systems to a production environment I decided to restart the Meta Data creation part and start from scratch. The IPs had changed entirely in the production environment. Issuing drdbadm create-md r0 in both the servers runs successfully. But when I do "drbdadm -- --overwrite-data-of-peer primary all" on the primary it fails to start the re sync. My config file is as given below resource r0 { protocol C; syncer { rate 50M; } startup { wfc-timeout 15; degr-wfc-timeout 60; } net { cram-hmac-alg sha1; shared-secret "aklsadkjlhdbskjndsf8738734jkfkjfkjf"; } on primaryds { device /dev/drbd0; disk /dev/md2; address 172.16.7.1:7788; meta-disk internal; } on secondaryds { device /dev/drbd0; disk /dev/md2; address 172.16.7.3:7788; meta-disk internal; } } Status on primary root at primaryds:~# cat /proc/drbd version: 8.3.7 (api:88/proto:86-91) GIT-hash: ea9e28dbff98e331a62bcbcc63a6135808fe2917 build by root at primaryds, 2012-05-12 15:08:01 0: cs:WFBitMapS ro:Primary/Secondary ds:UpToDate/Inconsistent C r---- ns:0 nr:0 dw:0 dr:200 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:5690352828 Status on secondary root at secondaryds:/etc/drbd.d# cat /proc/drbd version: 8.3.7 (api:88/proto:86-91) GIT-hash: ea9e28dbff98e331a62bcbcc63a6135808fe2917 build by root at secondaryds, 2012-05-12 15:25:25 0: cs:WFBitMapT ro:Secondary/Primary ds:Inconsistent/UpToDate C r---- ns:0 nr:0 dw:0 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:5690352828 Log of Primary May 30 13:42:23 primaryds kernel: [ 1584.057076] block drbd0: role( Secondary -> Primary ) disk( Inconsistent -> UpToDate ) May 30 13:42:23 primaryds kernel: [ 1584.086264] block drbd0: Forced to consider local data as UpToDate! May 30 13:42:23 primaryds kernel: [ 1584.086303] block drbd0: Creating new current UUID May 30 13:42:26 primaryds kernel: [ 1586.405551] block drbd0: drbd_sync_handshake: May 30 13:42:26 primaryds kernel: [ 1586.405564] block drbd0: self E8A075F378173D4B:0000000000000004:0000000000000000:0000000000000000 bits:1422588207 flags:0 May 30 13:42:26 primaryds kernel: [ 1586.405574] block drbd0: peer 0000000000000004:0000000000000000:0000000000000000:0000000000000000 bits:1422588207 flags:0 May 30 13:42:26 primaryds kernel: [ 1586.405582] block drbd0: uuid_compare()=2 by rule 30 May 30 13:42:26 primaryds kernel: [ 1586.405587] block drbd0: Becoming sync source due to disk states. May 30 13:42:26 primaryds kernel: [ 1586.405592] block drbd0: Writing the whole bitmap, full sync required after drbd_sync_handshake. May 30 13:42:27 primaryds kernel: [ 1588.171638] block drbd0: 5427 GB (1422588207 bits) marked out-of-sync by on disk bit-map. May 30 13:42:27 primaryds kernel: [ 1588.172769] block drbd0: conn( Connected -> WFBitMapS ) Log in Secondary May 30 13:42:24 secondaryds kernel: [ 1563.304894] block drbd0: peer( Secondary - Primary ) pdsk( Inconsistent - UpToDate ) May 30 13:42:24 secondaryds kernel: [ 1563.339674] block drbd0: drbd_sync_handshake: May 30 13:42:24 secondaryds kernel: [ 1563.339685] block drbd0: self 0000000000000004:0000000000000000:0000000000000000:0000000000000000 bits:1422588207 flags:0 May 30 13:42:24 secondaryds kernel: [ 1563.339695] block drbd0: peer E8A075F378173D4B:0000000000000004:0000000000000000:0000000000000000 bits:1422588207 flags:0 May 30 13:42:24 secondaryds kernel: [ 1563.339703] block drbd0: uuid_compare()=-2 by rule 20 May 30 13:42:24 secondaryds kernel: [ 1563.339709] block drbd0: Becoming sync target due to disk states. May 30 13:42:24 secondaryds kernel: [ 1563.339714] block drbd0: Writing the whole bitmap, full sync required after drbd_sync_handshake. May 30 13:42:26 secondaryds kernel: [ 1565.652342] block drbd0: 5427 GB (1422588207 bits) marked out-of-sync by on disk bit-map. May 30 13:42:26 secondaryds kernel: [ 1565.652965] block drbd0: conn( Connected - WFBitMapT ) The serves are not responding once it reaches this stage. Tried redoing it couple of time but noting happens. Why could the resync not be taking place? I would like some advice? Directions?

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• How do I reset/update my BIOS for Optiplex GX280?

  - by Sam Langlhey

  So far this has been a nightmare for me, which has been frustrating me constantly. I am using Dell Optiplex GX280 with Windows XP home edition, which is running a BIOS version A04. Recently, i've rebooted the pc to find out that its not booting. It will get to the Windows boot up screen with the progress bar but only to restart to the same process again, over and over. Frustrated that I am, i've inserted the Windows recovery CD to at least either repair of reinstall the operating system to find out that was not possible. I hit F8 to have the boot options, each of the boot option that I've selected gave me an error saying: "Selected boot device is not available." Right after that, I went to the BIOS setting and did a diagnostic test, which recognized all the Boot devices onboard. Now, I cannot even repair of reinstall Windows XP, because the system is not booting from none of the boot devices. The surprise is when I removed the hard-drive from the computer and loaded it on into another computer successfully; that's right, there is nothing wrong with the hard drive. After that I was totally puzzled. I found a few pointers online saying that the BIOS start-up block might be corrupted itself and I might need to flash/update the BIOS. I found the detailed instruction on how to create a Boot up disk by downloading the BIOS firmware from the manufacture's website. I did exactly as instructed below: Download the latest version or your choose version of BIOS file for your computer or motherboard from the manufacturer’s support site. Rename the downloaded file to AMIBOOT.ROM. Copy the file to a floppy disk. Insert the floppy disk to the floppy drive. Turn on the system. After I did that and powered on the PC to boot from the floppy drive, it gave me this error message: "Non-System Disk or Disk Error. Replace and Strike any key when ready." I did all that, and I kept on pressing [Ctrl]+[Home] to force it, but it did not did any satisfying result. Desperate as I am, my next attempt is to try the instruction below. Since I want to be ready, in the event it does not work, do you have any solution that you can provide? Please keep in mind that I cannot boot from any of the devices at this moment. My only hope now is to come on with a solution that will work through the Floppy drive, since that's the only drive that affected. Thank you very much for your advice and support in advance. To create a Windows startup disk, insert a floppy disk into the drive of a similarly configured, working Windows XP system, launch My Computer, right-click the floppy disk icon, and select the Format command from the context menu. When you see the Format dialog box, leave all the default settings as they are and click the Start button. Once the format operation is complete, close the Format dialog box to return to My Computer, double-click the drive C icon to access the root directory, and copy the following three files to the floppy disk: Boot.ini NTLDR Ntdetect.com

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• Informaton of pendriver with libudv on linux

  - by Catanzaro

  I'm doing a little app in C that read the driver information of my pendrive: Plugged it and typed dmesg: [ 7676.243994] scsi 7:0:0:0: Direct-Access Lexar USB Flash Drive 1100 PQ: 0 ANSI: 0 CCS [ 7676.248359] sd 7:0:0:0: Attached scsi generic sg2 type 0 [ 7676.256733] sd 7:0:0:0: [sdb] 7831552 512-byte logical blocks: (4.00 GB/3.73 GiB) [ 7676.266559] sd 7:0:0:0: [sdb] Write Protect is off [ 7676.266566] sd 7:0:0:0: [sdb] Mode Sense: 43 00 00 00 [ 7676.266569] sd 7:0:0:0: [sdb] Assuming drive cache: write through [ 7676.285373] sd 7:0:0:0: [sdb] Assuming drive cache: write through [ 7676.285383] sdb: sdb1 [ 7676.298661] sd 7:0:0:0: [sdb] Assuming drive cache: write through [ 7676.298667] sd 7:0:0:0: [sdb] Attached SCSI removable disk with "udevadm info -q all -n /dev/sdb" P: /devices/pci0000:00/0000:00:11.0/0000:02:03.0/usb1/1-1/1-1:1.0/host7/target7:0:0/7:0:0:0/block/sdb N: sdb W: 36 S: block/8:16 S: disk/by-id/usb-Lexar_USB_Flash_Drive_AA5OCYQII8PSQXBB-0:0 S: disk/by-path/pci-0000:02:03.0-usb-0:1:1.0-scsi-0:0:0:0 E: UDEV_LOG=3 E: DEVPATH=/devices/pci0000:00/0000:00:11.0/0000:02:03.0/usb1/1-1/1-1:1.0/host7/target7:0:0/7:0:0:0/block/sdb E: MAJOR=8 E: MINOR=16 E: DEVNAME=/dev/sdb E: DEVTYPE=disk E: SUBSYSTEM=block E: ID_VENDOR=Lexar E: ID_VENDOR_ENC=Lexar\x20\x20\x20 E: ID_VENDOR_ID=05dc E: ID_MODEL=USB_Flash_Drive E: ID_MODEL_ENC=USB\x20Flash\x20Drive\x20 E: ID_MODEL_ID=a813 E: ID_REVISION=1100 E: ID_SERIAL=Lexar_USB_Flash_Drive_AA5OCYQII8PSQXBB-0:0 E: ID_SERIAL_SHORT=AA5OCYQII8PSQXBB E: ID_TYPE=disk E: ID_INSTANCE=0:0 E: ID_BUS=usb E: ID_USB_INTERFACES=:080650: E: ID_USB_INTERFACE_NUM=00 E: ID_USB_DRIVER=usb-storage E: ID_PATH=pci-0000:02:03.0-usb-0:1:1.0-scsi-0:0:0:0 E: ID_PART_TABLE_TYPE=dos E: UDISKS_PRESENTATION_NOPOLICY=0 E: UDISKS_PARTITION_TABLE=1 E: UDISKS_PARTITION_TABLE_SCHEME=mbr E: UDISKS_PARTITION_TABLE_COUNT=1 E: DEVLINKS=/dev/block/8:16 /dev/disk/by-id/usb-Lexar_USB_Flash_Drive_AA5OCYQII8PSQXBB-0:0 /dev/disk/by-path/pci-0000:02:03.0-usb-0:1:1.0-scsi-0:0:0:0 and my software is: Codice: Seleziona tutto #include <stdio.h> #include <libudev.h> #include <stdlib.h> #include <locale.h> #include <unistd.h> int main(void) { struct udev_enumerate *enumerate; struct udev_list_entry *devices, *dev_list_entry; struct udev_device *dev; /* Create the udev object */ struct udev *udev = udev_new(); if (!udev) { printf("Can't create udev\n"); exit(0); } enumerate = udev_enumerate_new(udev); udev_enumerate_add_match_subsystem(enumerate, "scsi_generic"); udev_enumerate_scan_devices(enumerate); devices = udev_enumerate_get_list_entry(enumerate); udev_list_entry_foreach(dev_list_entry, devices) { const char *path; /* Get the filename of the /sys entry for the device and create a udev_device object (dev) representing it */ path = udev_list_entry_get_name(dev_list_entry); dev = udev_device_new_from_syspath(udev, path); /* usb_device_get_devnode() returns the path to the device node itself in /dev. */ printf("Device Node Path: %s\n", udev_device_get_devnode(dev)); /* The device pointed to by dev contains information about the hidraw device. In order to get information about the USB device, get the parent device with the subsystem/devtype pair of "usb"/"usb_device". This will be several levels up the tree, but the function will find it.*/ dev = udev_device_get_parent_with_subsystem_devtype( dev, "block", "disk"); if (!dev) { printf("Errore\n"); exit(1); } /* From here, we can call get_sysattr_value() for each file in the device's /sys entry. The strings passed into these functions (idProduct, idVendor, serial, etc.) correspond directly to the files in the directory which represents the USB device. Note that USB strings are Unicode, UCS2 encoded, but the strings returned from udev_device_get_sysattr_value() are UTF-8 encoded. */ printf(" VID/PID: %s %s\n", udev_device_get_sysattr_value(dev,"idVendor"), udev_device_get_sysattr_value(dev, "idProduct")); printf(" %s\n %s\n", udev_device_get_sysattr_value(dev,"manufacturer"), udev_device_get_sysattr_value(dev,"product")); printf(" serial: %s\n", udev_device_get_sysattr_value(dev, "serial")); udev_device_unref(dev); } /* Free the enumerator object */ udev_enumerate_unref(enumerate); udev_unref(udev); return 0; } the problem is that i obtain in output: Device Node Path: /dev/sg0 Errore and dont view information. subsystem and the devtype i think that are inserted well : "block" and "disk". thanks for help. Bye

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• how to customize the listbox selected item style in silverlight 4

  - by Phani Kumar PV

  I am having a silverlight listbox in which a list item contains an image, its name and its price. the layout of the list item will be as follows: Under the image the image name will be shown, under the image name the price will be shown. Now the problem is when i select an list item all the three items(image, image name and its price ) are selected. this is the default behavior. Now the requirement is when i select a list item only the image should be selected. please let me know if there is a way to do this..

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• Desigining problem in asp.net?

  - by Surya sasidhar

  hi, in my application i am displaying a image (image size is 90px width,90px height) and below that i displaying title of the image in data list control (horizontal display). i used table (tags) in source code. the image and title will display dynamically from database. my problem is when title is too long it is disturbing my design, when title is too long it should come down, the title should same size as the picture if it is too long it come down in second line. for example the below is a image and below that image title -------------- | | | | | | | | | | |_____________| surya sasidhar rao the above image title is too long. the letters "rao" should come in second line. -------------- | | | | | | | | | | |_____________| surya sasidhar rao this is the desing i want. how can i get it. this is my source code ' CommandName="Play" CommandArgument='<%#Eval("VideoName")+"|"+Eval("videoid")+","+Eval("username")%' Width ="90px" Height ="90px" / ' CommandName="title" CommandArgument='<%#Eval("VideoName")+"|"+Eval("videoid")+","+Eval("username")%' ' '

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• How to set a Transparent Background of JPanel

  - by Imran

  Hi, I need to know if a JPanel`s bacground can be set to Transparent? My frame is has two Jpanels Image Panel and Feature Panel, Feature Panel is overlapping Image Panel, the Image Panel is working as a background and it is loading image from a remote Url, now I want to draw shaps on Feature Panel , but now Image Panel cannot be seen due to Feature Panel's background color. I need to make Feature Panel background transparent while still drawing its shapes and i want Image Panel to be visible since it is doing tiling and cache function of images. I need to seperate the image drawing and shape drawing thats why I`m using two jPanels! is there anyway the overlapping Jpanel have a transparent background? thanks

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• Make overflow hidden when shrinking div

  - by johnnietheblack

  I have a div with an image in it, and the image is too large for the div. I have solved the overflow problem with the obvious CSS overflow:hidden trick. But, the problem is that when the div's parent resizes (shrinks), the div holding the image won't shrink because of the image in it. Is there a way to have a resizable div with an image in it (almost like a background image) that overflows? MY DIV STRUCTURE: <div id="parent"> <div id="image_holder"> <!-- this image will inevitably be larger than its parent div --> <img src="too_big_for_div.jpg" /> </div> </div> MY CSS: #parent { width:100%;} #image_holder { width:100%; overflow:hidden;} The #image_holder div will not resize to a smaller dimension now. Any ideas?

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• Silverlight - GestureService & GestureListner in code-behind

  - by Rajah

  I want to do the following XAML code in code behind and not sure how to add the GestureService and GestureListner onto the Image. Xaml code: <Image Grid.Row="1" x:Name="img" VerticalAlignment="Center" HorizontalAlignment="Center" Width="200"> <toolkit:GestureService.GestureListener> <toolkit:GestureListener/> </toolkit:GestureService.GestureListener> </Image> Code behind equivalent: Image image = new Image(); //how do I add GestureService and GestureListner? ContentPanel.Children.Add(image);

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• ASP.net and css styles

  - by c11ada

  can some on help me on how i can reference images i have all my images stored in an image folder which is located in the root folder (..\images) in my css class i have the the following #image { background-position: left; background-repeat: no-repeat;} .background { background-image: (..\images\image.gif); } and in my .cs file i have image.Attributes.Add("class", "background"); image is a div tag which is in my aspx code !! when i run this code i image doesnt show, any ideas what i might be doing wrong

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• Strange php behaviour on a gd function

  - by mck89

  Hi, i met a very strange PHP behaviour, i don't understand why it behaves like this. I'm using the imagesetbrush function in this way: class foo { function setbrush($image) { //$this->_resource contains the main image resource imagesetbrush($this->_resource, $image); } } ... $res=imagecreatefrompng("image.png"); $class->setbrush($res); in this way it works, but if i change the code like this: class foo { function setbrush($image) { $res=imagecreatefrompng($image); imagesetbrush($this->_resource, $res); } } ... $class->setbrush("image.png"); it doesn't work anymore. Do you see some error? It doesn't show me any message it simply doesn't execute the function.

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• Rails 3.1 assets not recognizing new images uploaded by rmagick until server restart

  - by Mr_Nizzle

  I have my Rails 3.1.0 application running with passenger in production environment and I have a section where the application allows the user to change his profile picture so I upload the image using an ajax uploader and in my controller I upload the file and generate different sizes for the image with rmagick then I render the new image with an image_tag but the application won't show the image till I restart the server. What I get is No route matches [GET] "assets/path/to/image.png" If I restart the server It will show the image, but obviously I can't be restarting the server every once a user uploads a new image. How can I solve the keeping the assets working the right way?

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• How to use Selector when click a item in list

  - by notenking

  I occur a problem when develop a application on android. There have two image which can be download from server in a list item, it will show one image and will show another image when user select or click this item . if I try to download another image from server when user click it,the user will never have time to see it, for this time is shorter than download image form server, so i want to download two of them,and when I click it again,the app can invoke another image from local. but I do not know how to invoke this image ? Any suggestion will be appreciate. thx

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• How to implement Cocoa copyWithZone on derived object in MonoMac C#?

  - by Justin Aquadro

  I'm currently porting a small Winforms-based .NET application to use a native Mac front-end with MonoMac. The application has a TreeControl with icons and text, which does not exist out of the box in Cocoa. So far, I've ported almost all of the ImageAndTextCell code in Apple's DragNDrop example: https://developer.apple.com/library/mac/#samplecode/DragNDropOutlineView/Listings/ImageAndTextCell_m.html#//apple_ref/doc/uid/DTS40008831-ImageAndTextCell_m-DontLinkElementID_6, which is assigned to an NSOutlineView as a custom cell. It seems to be working almost perfectly, except that I have not figured out how to properly port the copyWithZone method. Unfortunately, this means the internal copies that NSOutlineView is making do not have the image field, and it leads to the images briefly vanishing during expand and collapse operations. The objective-c code in question is: - (id)copyWithZone:(NSZone *)zone { ImageAndTextCell *cell = (ImageAndTextCell *)[super copyWithZone:zone]; // The image ivar will be directly copied; we need to retain or copy it. cell->image = [image retain]; return cell; } The first line is what's tripping me up, as MonoMac does not expose a copyWithZone method, and I don't know how to otherwise call it. Update Based on current answers and additional research and testing, I've come up with a variety of models for copying an object. static List<ImageAndTextCell> _refPool = new List<ImageAndTextCell>(); // Method 1 static IntPtr selRetain = Selector.GetHandle ("retain"); [Export("copyWithZone:")] public virtual NSObject CopyWithZone(IntPtr zone) { ImageAndTextCell cell = new ImageAndTextCell() { Title = Title, Image = Image, }; Messaging.void_objc_msgSend (cell.Handle, selRetain); return cell; } // Method 2 [Export("copyWithZone:")] public virtual NSObject CopyWithZone(IntPtr zone) { ImageAndTextCell cell = new ImageAndTextCell() { Title = Title, Image = Image, }; _refPool.Add(cell); return cell; } [Export("dealloc")] public void Dealloc () { _refPool.Remove(this); this.Dispose(); } // Method 3 static IntPtr selRetain = Selector.GetHandle ("retain"); [Export("copyWithZone:")] public virtual NSObject CopyWithZone(IntPtr zone) { ImageAndTextCell cell = new ImageAndTextCell() { Title = Title, Image = Image, }; _refPool.Add(cell); Messaging.void_objc_msgSend (cell.Handle, selRetain); return cell; } // Method 4 static IntPtr selRetain = Selector.GetHandle ("retain"); static IntPtr selRetainCount = Selector.GetHandle("retainCount"); [Export("copyWithZone:")] public virtual NSObject CopyWithZone (IntPtr zone) { ImageAndTextCell cell = new ImageAndTextCell () { Title = Title, Image = Image, }; _refPool.Add (cell); Messaging.void_objc_msgSend (cell.Handle, selRetain); return cell; } public void PeriodicCleanup () { List<ImageAndTextCell> markedForDelete = new List<ImageAndTextCell> (); foreach (ImageAndTextCell cell in _refPool) { uint count = Messaging.UInt32_objc_msgSend (cell.Handle, selRetainCount); if (count == 1) markedForDelete.Add (cell); } foreach (ImageAndTextCell cell in markedForDelete) { _refPool.Remove (cell); cell.Dispose (); } } // Method 5 static IntPtr selCopyWithZone = Selector.GetHandle("copyWithZone:"); [Export("copyWithZone:")] public virtual NSObject CopyWithZone(IntPtr zone) { IntPtr copyHandle = Messaging.IntPtr_objc_msgSendSuper_IntPtr(SuperHandle, selCopyWithZone, zone); ImageAndTextCell cell = new ImageAndTextCell(copyHandle) { Image = Image, }; _refPool.Add(cell); return cell; } Method 1: Increases the retain count of the unmanaged object. The unmanaged object will persist persist forever (I think? dealloc never called), and the managed object will be harvested early. Seems to be lose-lose all-around, but runs in practice. Method 2: Saves a reference of the managed object. The unmanaged object is left alone, and dealloc appears to be invoked at a reasonable time by the caller. At this point the managed object is released and disposed. This seems reasonable, but on the downside the base type's dealloc won't be run (I think?) Method 3: Increases the retain count and saves a reference. Unmanaged and managed objects leak forever. Method 4: Extends Method 3 by adding a cleanup function that is run periodically (e.g. during Init of each new ImageAndTextCell object). The cleanup function checks the retain counts of the stored objects. A retain count of 1 means the caller has released it, so we should as well. Should eliminate leaking in theory. Method 5: Attempt to invoke the copyWithZone method on the base type, and then construct a new ImageAndTextView object with the resulting handle. Seems to do the right thing (the base data is cloned). Internally, NSObject bumps the retain count on objects constructed like this, so we also use the PeriodicCleanup function to release these objects when they're no longer used. Based on the above, I believe Method 5 is the best approach since it should be the only one that results in a truly correct copy of the base type data, but I don't know if the approach is inherently dangerous (I am also making some assumptions about the underlying implementation of NSObject). So far nothing bad has happened "yet", but if anyone is able to vet my analysis then I would be more confident going forward.

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• Exit Tks mainloop in Python?

  - by Olof

  I'm writing a slideshow program with Tkinter, but I don't know how to go to the next image without binding a key. import os, sys import Tkinter import Image, ImageTk import time root = Tkinter.Tk() w, h = root.winfo_screenwidth(), root.winfo_screenheight() root.overrideredirect(1) root.geometry("%dx%d+0+0" % (w, h)) root.focus_set() root.bind("<Escape>", lambda e: e.widget.quit()) image_path = os.path.join(os.getcwd(), 'images/') dirlist = os.listdir(image_path) for f in dirlist: try: image = Image.open(image_path+f) tkpi = ImageTk.PhotoImage(image) label_image = Tkinter.Label(root, image=tkpi) # ? label_image.place(x=0,y=0,width=w,height=h) root.mainloop(0) except IOError: pass root.destroy() I would like to add a time.sleep(10) "instead" of the root.mainloop(0) so that it would go to the next image after 10s. Now it changes when I press ESC. How can I have a timer there?

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• Using DrawString to draw text with no border

  - by griegs

  I have this code; public static Image AddText(this Image image, ImageText text) { Graphics surface = Graphics.FromImage(image); Font font = new Font("Tahoma", 10); System.Drawing.SolidBrush brush = new SolidBrush(Color.Red); surface.DrawString(text.Text, font, brush, new PointF { X = 30, Y = 10 }); surface.Dispose(); return image; } However, when the text is drawn onto my image it's red with a black border or shadowing. How can I write text to an image without any border or shadow?

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• Why does embeded vimeo video keeps on flickering?

  - by GaVrA

  Look here: http://mashinaizec.com/mons-2 When you click on some image, fancybox comes in and display that image and put overlay above entire page. What also happens is that vimeo video on the right keeps refreshing preview image whenever i click on any image in gallery. Also, if you scroll the window to the bottom and them click on, for example, on the bottom left image, overlay shoots in, image is there but see that little X in the top right corner of the image? It is not displayed as it should. Any idea what to do?

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• EventSetter - error XAML in Visual Studio designer

  - by pileggi

  Hi! I've done my TreeView all with XAML but now I'd like to manage an event with code-behind. The HierarchicalDataTemplate contains an Image. I need to capture the events MouseEnter / MouseLeave on the Image. I've tried in this way: <Image x:Name="imgArticolo" Source="{Binding imgArt}"> <Image.Style> <Style TargetType="{x:Type Image}"> <EventSetter Event="MouseEnter" Handler="iArt_MouseEnter"/> </Style> </Image.Style> </Image> But in the designer of Visual Studio appear the error: "Impossible to load a file XAML with EventSetter". How can I remedy? Thank you! Pileggi

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• ASP.NET Build Images Links Dynamically

  - by coson

  Good Day, I am developing a website that has product images on an external server. I have code that tests to see if the image exists like (pseudo code): DynamicString = FunctionThatCreatesDynamicString() ' DynamicString = "http://external_server/path/to/file1.jpg" If ImageExists(DyanmicString) = StatusCode.200 Then ' Embed link in ASP.NET page Else ' Embed not found image in ASP.NET page End If My code builds fine and appears to execute. The problem occurs when I attempt to view the external link in a browser, the image appears properly (I have to authenticate first, but that's OK considering I'm on an internal network and this app will be used internally). However, when I attempt the view the source in my generated HTML page, I am seeing the image to the "Not Found" image when I know the image is there. I compared all the characters in my dynamically assembled to the external link and all the characters are matching up correctly. I'm wondering if the authentication has anything to do with why the image is not rendering properly on my rendered HTML. Any thoughts? TIA, coson

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• Echo mysql results in a loop?

  - by Roy D. Porter

  I am using turn.js to make a book. Every div within the 'deathnote' div becomes a new page. <div id="deathnote"> //starts book <div style="background-image:url(images/coverpage.jpg);"></div> //creates new page <div style="background-image:url(images/paper.jpg);"></div> //creates new page <div style="background-image:url(images/paper.jpg);"></div> //creates new page </div> //ends book What I am doing is trying to get 3 'content' (content being a name and cause of death) divs onto 1 page, and then generate a new page. So here is what i want: <div id="deathnote"> //starts book <div style="background-image:url(images/coverpage.jpg);"></div> //creates new page <div style="background-image:url(images/paper.jpg);"></div> //creates new page <div style="background-image:url(images/paper.jpg);"> //creates new page but leaves it open <div> CONTENT </div> <div> CONTENT </div> <div> CONTENT </div> </div> //ends the page </div> //ends book Seems simple enough, however the content is data from a MySQL DB, so i have to echo it in using PHP. Here is what i have so far <div id="deathnote"> <div style="background-image:url(images/coverpage.jpg);"></div> <div style="background-image:url(images/paper.jpg);"></div> <div style="background-image:url(images/paper.jpg);"></div> <div style="background-image:url(images/paper.jpg);"></div> <div style="background-image:url(images/paper.jpg);"></div> <div style="background-image:url(images/paper.jpg);"></div> <?php $pagecount = 0; $db = new mysqli('localhost', 'username', 'passw', 'DB'); if($db->connect_errno > 0){ die('Unable to connect to database [' . $db->connect_error . ']'); } $sql = <<<SQL SELECT * FROM `TABLE` SQL; if(!$result = $db->query($sql)){ die('There was an error running the query [' . $db->error . ']'); } //IGNORE ALL OF THE GARBAGE ABOVE. IT IS SIMPLE CONNECTING SCRIPT THAT I KNOW WORKS //THE METHOD I AM HAVING TROUBLE WITH IS BELOW $pagecount = 0; while($row = $result->fetch_assoc()){ //GETS THE VALUE (and makes sure it isn't nothing echo '<div style="background-image:url(images/paper.jpg);">'; //THIS OPENS A NEW PAGE while ($pagecount !== 3) { //KEEPS COUNT OF HOW MUCH CONTENT DIVS IS ON THE PAGE while($row = $result->fetch_assoc()){ //START A CONTENT DIV echo '<div class="content"><div class="name">' . $row['victim'] . '</div><div class="cod">' . $row['cod'] . '</div></div>'; //END A CONTENT DIV $pagecount++; //UP THE PAGE COUNT } } $pagecount=0; //PUT IT BACK TO 0 echo '</div>'; //END PAGE } $db->close(); ?> <div style="background-image:url(images/backpage.jpg);"></div> //BACK PAGE </div> At the moment i seem to be causing and infinite loop so the page won't load. The problem resides within the while loops. Any help is greatly appreciated. Thanks in advance guys. :)

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• Fatsest way to edit alpha of CGImage (or UIImage) with touch and then display?

  - by Pankaj

  I have two image views, one on top of the another, with two different images. As the user touches the image and moves his/her finger, the top image should become transparent along the touch points with a fixed radius. (Like the PhotoChop app). Currently I am doing it this way... For each touch. Get a copy of the image buffer from CGImage of the top image. Edit the alpha channel of the buffer to create a transparent circle centered at the touch point. Create new CGImage from the buffer. Create UIImage from the CGImage and use the new UIImage as the top image view's image. This works but as you can see too many copy, creates are involved and it is slow. Can somebody please suggest me a faster way of doing the same thing?

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